APA (7th ed.) Citation
Lewis, J. P. (1969). <An> Introduction to Mathematics: For Students of Economics (2. ed.). MacMillan Press.
Chicago Style (17th ed.) Citation
Lewis, J. Parry. <An> Introduction to Mathematics: For Students of Economics. 2. ed. London: MacMillan Press, 1969.
MLA (9th ed.) Citation
Lewis, J. Parry. <An> Introduction to Mathematics: For Students of Economics. 2. ed. MacMillan Press, 1969.
Warning: These citations may not always be 100% accurate.